//! CPU engine machinery, the sibling of [`crate::gpu`].
//!
//! [`sim_thread`] runs a state on its own thread on native and inside the frame loop on the web. The three
//! `*_engine` modules each build a state from an authoring trait. [`field`] holds the grid layers an agent model can
//! sit over, and [`layout`] relaxes a network model's node positions. [`primitives`] holds the chunking, scatter,
//! lane and connected-component building blocks that the engines and models call.
pub use ;
pub use ;